src/hardware/hantek-dso/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <math.h>
  22 #include <stdio.h>
  23 #include <stdint.h>
  24 #include <stdlib.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <sys/time.h>
  31 #include <inttypes.h>
  32 #include <glib.h>
  33 #include <libusb.h>
  34 #include <libsigrok/libsigrok.h>
  35 #include "libsigrok-internal.h"
  36 #include "protocol.h"
  37
  38 /* Max time in ms before we want to check on USB events */
  39 /* TODO tune this properly */
  40 #define TICK 1
  41
  42 #define NUM_TIMEBASE 10
  43 #define NUM_VDIV     8
  44
  45 #define NUM_BUFFER_SIZES 2
  46
  47 static const uint32_t scanopts[] = {
  48         SR_CONF_CONN,
  49 };
  50
  51 static const uint32_t drvopts[] = {
  52         SR_CONF_OSCILLOSCOPE,
  53 };
  54
  55 static const uint32_t devopts[] = {
  56         SR_CONF_CONTINUOUS,
  57         SR_CONF_CONN | SR_CONF_GET,
  58         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
  59         SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  60         SR_CONF_NUM_HDIV | SR_CONF_GET,
  61         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  62         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  63         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET,
  64         SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  65         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  66         SR_CONF_NUM_VDIV | SR_CONF_GET,
  67         SR_CONF_TRIGGER_LEVEL | SR_CONF_GET | SR_CONF_SET,
  68 };
  69
  70 static const uint32_t devopts_cg[] = {
  71         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  72         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  73         SR_CONF_FILTER | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  74 };
  75
  76 static const char *channel_names[] = {
  77         "CH1", "CH2",
  78 };
  79
  80 static const uint64_t buffersizes_32k[] = {
  81         (10 * 1024), (32 * 1024),
  82 };
  83 static const uint64_t buffersizes_512k[] = {
  84         (10 * 1024), (512 * 1024),
  85 };
  86 static const uint64_t buffersizes_14k[] = {
  87         (10 * 1024), (14 * 1024),
  88 };
  89
  90 static const struct dso_profile dev_profiles[] = {
  91         {       0x04b4, 0x2090, 0x04b5, 0x2090,
  92                 "Hantek", "DSO-2090",
  93                 buffersizes_32k,
  94                 "hantek-dso-2090.fw" },
  95         {       0x04b4, 0x2150, 0x04b5, 0x2150,
  96                 "Hantek", "DSO-2150",
  97                 buffersizes_32k,
  98                 "hantek-dso-2150.fw" },
  99         {       0x04b4, 0x2250, 0x04b5, 0x2250,
 100                 "Hantek", "DSO-2250",
 101                 buffersizes_512k,
 102                 "hantek-dso-2250.fw" },
 103         {       0x04b4, 0x5200, 0x04b5, 0x5200,
 104                 "Hantek", "DSO-5200",
 105                 buffersizes_14k,
 106                 "hantek-dso-5200.fw" },
 107         {       0x04b4, 0x520a, 0x04b5, 0x520a,
 108                 "Hantek", "DSO-5200A",
 109                 buffersizes_512k,
 110                 "hantek-dso-5200A.fw" },
 111         ALL_ZERO
 112 };
 113
 114 static const uint64_t timebases[][2] = {
 115         /* microseconds */
 116         { 10, 1000000 },
 117         { 20, 1000000 },
 118         { 40, 1000000 },
 119         { 100, 1000000 },
 120         { 200, 1000000 },
 121         { 400, 1000000 },
 122         /* milliseconds */
 123         { 1, 1000 },
 124         { 2, 1000 },
 125         { 4, 1000 },
 126         { 10, 1000 },
 127         { 20, 1000 },
 128         { 40, 1000 },
 129         { 100, 1000 },
 130         { 200, 1000 },
 131         { 400, 1000 },
 132 };
 133
 134 static const uint64_t samplerates[] = {
 135         SR_KHZ(20),
 136         SR_KHZ(25),
 137         SR_KHZ(50),
 138         SR_KHZ(100),
 139         SR_KHZ(200),
 140         SR_KHZ(250),
 141         SR_KHZ(500),
 142         SR_MHZ(1),
 143         SR_MHZ(2),
 144         SR_MHZ(5),
 145         SR_MHZ(10),
 146         SR_MHZ(20),
 147         SR_MHZ(25),
 148         SR_MHZ(50),
 149         SR_MHZ(100),
 150         SR_MHZ(125),
 151         /* Fast mode not supported yet.
 152         SR_MHZ(200),
 153         SR_MHZ(250), */
 154 };
 155
 156 static const uint64_t vdivs[][2] = {
 157         /* millivolts */
 158         { 10, 1000 },
 159         { 20, 1000 },
 160         { 50, 1000 },
 161         { 100, 1000 },
 162         { 200, 1000 },
 163         { 500, 1000 },
 164         /* volts */
 165         { 1, 1 },
 166         { 2, 1 },
 167         { 5, 1 },
 168 };
 169
 170 static const char *trigger_sources[] = {
 171         "CH1", "CH2", "EXT", "forced"
 172 };
 173
 174 static const char *trigger_slopes[] = {
 175         "r", "f",
 176 };
 177
 178 static const char *coupling[] = {
 179         "AC", "DC", "GND",
 180 };
 181
 182 static struct sr_dev_inst *dso_dev_new(const struct dso_profile *prof)
 183 {
 184         struct sr_dev_inst *sdi;
 185         struct sr_channel *ch;
 186         struct sr_channel_group *cg;
 187         struct dev_context *devc;
 188         unsigned int i;
 189
 190         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 191         sdi->status = SR_ST_INITIALIZING;
 192         sdi->vendor = g_strdup(prof->vendor);
 193         sdi->model = g_strdup(prof->model);
 194
 195         /*
 196          * Add only the real channels -- EXT isn't a source of data, only
 197          * a trigger source internal to the device.
 198          */
 199         for (i = 0; i < ARRAY_SIZE(channel_names); i++) {
 200                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
 201                 cg = sr_channel_group_new(sdi, channel_names[i], NULL);
 202                 cg->channels = g_slist_append(cg->channels, ch);
 203         }
 204
 205         devc = g_malloc0(sizeof(struct dev_context));
 206         devc->profile = prof;
 207         devc->dev_state = IDLE;
 208         devc->timebase = DEFAULT_TIMEBASE;
 209         devc->samplerate = DEFAULT_SAMPLERATE;
 210         devc->ch_enabled[0] = TRUE;
 211         devc->ch_enabled[1] = TRUE;
 212         devc->voltage[0] = DEFAULT_VOLTAGE;
 213         devc->voltage[1] = DEFAULT_VOLTAGE;
 214         devc->coupling[0] = DEFAULT_COUPLING;
 215         devc->coupling[1] = DEFAULT_COUPLING;
 216         devc->voffset_ch1 = DEFAULT_VERT_OFFSET;
 217         devc->voffset_ch2 = DEFAULT_VERT_OFFSET;
 218         devc->voffset_trigger = DEFAULT_VERT_TRIGGERPOS;
 219         devc->framesize = DEFAULT_FRAMESIZE;
 220         devc->triggerslope = SLOPE_POSITIVE;
 221         devc->triggersource = g_strdup(DEFAULT_TRIGGER_SOURCE);
 222         devc->capture_ratio = DEFAULT_CAPTURE_RATIO;
 223         sdi->priv = devc;
 224
 225         return sdi;
 226 }
 227
 228 static int configure_channels(const struct sr_dev_inst *sdi)
 229 {
 230         struct dev_context *devc;
 231         struct sr_channel *ch;
 232         const GSList *l;
 233         int p;
 234
 235         devc = sdi->priv;
 236
 237         g_slist_free(devc->enabled_channels);
 238         devc->enabled_channels = NULL;
 239         devc->ch_enabled[0] = devc->ch_enabled[1] = FALSE;
 240         for (l = sdi->channels, p = 0; l; l = l->next, p++) {
 241                 ch = l->data;
 242                 if (p == 0)
 243                         devc->ch_enabled[0] = ch->enabled;
 244                 else
 245                         devc->ch_enabled[1] = ch->enabled;
 246                 if (ch->enabled)
 247                         devc->enabled_channels = g_slist_append(devc->enabled_channels, ch);
 248         }
 249
 250         return SR_OK;
 251 }
 252
 253 static void clear_helper(struct dev_context *devc)
 254 {
 255         g_free(devc->triggersource);
 256         g_slist_free(devc->enabled_channels);
 257 }
 258
 259 static int dev_clear(const struct sr_dev_driver *di)
 260 {
 261         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 262 }
 263
 264 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 265 {
 266         struct drv_context *drvc;
 267         struct dev_context *devc;
 268         struct sr_dev_inst *sdi;
 269         struct sr_usb_dev_inst *usb;
 270         struct sr_config *src;
 271         const struct dso_profile *prof;
 272         GSList *l, *devices, *conn_devices;
 273         struct libusb_device_descriptor des;
 274         libusb_device **devlist;
 275         int i, j;
 276         const char *conn;
 277         char connection_id[64];
 278
 279         drvc = di->context;
 280
 281         devices = 0;
 282
 283         conn = NULL;
 284         for (l = options; l; l = l->next) {
 285                 src = l->data;
 286                 if (src->key == SR_CONF_CONN) {
 287                         conn = g_variant_get_string(src->data, NULL);
 288                         break;
 289                 }
 290         }
 291         if (conn)
 292                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 293         else
 294                 conn_devices = NULL;
 295
 296         /* Find all Hantek DSO devices and upload firmware to all of them. */
 297         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 298         for (i = 0; devlist[i]; i++) {
 299                 if (conn) {
 300                         usb = NULL;
 301                         for (l = conn_devices; l; l = l->next) {
 302                                 usb = l->data;
 303                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 304                                         && usb->address == libusb_get_device_address(devlist[i]))
 305                                         break;
 306                         }
 307                         if (!l)
 308                                 /* This device matched none of the ones that
 309                                  * matched the conn specification. */
 310                                 continue;
 311                 }
 312
 313                 libusb_get_device_descriptor(devlist[i], &des);
 314
 315                 if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0)
 316                         continue;
 317
 318                 prof = NULL;
 319                 for (j = 0; dev_profiles[j].orig_vid; j++) {
 320                         if (des.idVendor == dev_profiles[j].orig_vid
 321                                 && des.idProduct == dev_profiles[j].orig_pid) {
 322                                 /* Device matches the pre-firmware profile. */
 323                                 prof = &dev_profiles[j];
 324                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 325                                 sdi = dso_dev_new(prof);
 326                                 sdi->connection_id = g_strdup(connection_id);
 327                                 devices = g_slist_append(devices, sdi);
 328                                 devc = sdi->priv;
 329                                 if (ezusb_upload_firmware(drvc->sr_ctx, devlist[i],
 330                                                 USB_CONFIGURATION, prof->firmware) == SR_OK) {
 331                                         /* Remember when the firmware on this device was updated */
 332                                         devc->fw_updated = g_get_monotonic_time();
 333                                 } else {
 334                                         sr_err("Firmware upload failed, name %s", prof->firmware);
 335                                 }
 336                                 /* Dummy USB address of 0xff will get overwritten later. */
 337                                 sdi->conn = sr_usb_dev_inst_new(
 338                                                 libusb_get_bus_number(devlist[i]), 0xff, NULL);
 339                                 break;
 340                         } else if (des.idVendor == dev_profiles[j].fw_vid
 341                                 && des.idProduct == dev_profiles[j].fw_pid) {
 342                                 /* Device matches the post-firmware profile. */
 343                                 prof = &dev_profiles[j];
 344                                 sr_dbg("Found a %s %s.", prof->vendor, prof->model);
 345                                 sdi = dso_dev_new(prof);
 346                                 sdi->connection_id = g_strdup(connection_id);
 347                                 sdi->status = SR_ST_INACTIVE;
 348                                 devices = g_slist_append(devices, sdi);
 349                                 sdi->inst_type = SR_INST_USB;
 350                                 sdi->conn = sr_usb_dev_inst_new(
 351                                                 libusb_get_bus_number(devlist[i]),
 352                                                 libusb_get_device_address(devlist[i]), NULL);
 353                                 break;
 354                         }
 355                 }
 356                 if (!prof)
 357                         /* not a supported VID/PID */
 358                         continue;
 359         }
 360         libusb_free_device_list(devlist, 1);
 361
 362         return std_scan_complete(di, devices);
 363 }
 364
 365 static int dev_open(struct sr_dev_inst *sdi)
 366 {
 367         struct dev_context *devc;
 368         struct sr_usb_dev_inst *usb;
 369         int64_t timediff_us, timediff_ms;
 370         int err;
 371
 372         devc = sdi->priv;
 373         usb = sdi->conn;
 374
 375         /*
 376          * If the firmware was recently uploaded, wait up to MAX_RENUM_DELAY_MS
 377          * for the FX2 to renumerate.
 378          */
 379         err = SR_ERR;
 380         if (devc->fw_updated > 0) {
 381                 sr_info("Waiting for device to reset.");
 382                 /* Takes >= 300ms for the FX2 to be gone from the USB bus. */
 383                 g_usleep(300 * 1000);
 384                 timediff_ms = 0;
 385                 while (timediff_ms < MAX_RENUM_DELAY_MS) {
 386                         if ((err = dso_open(sdi)) == SR_OK)
 387                                 break;
 388                         g_usleep(100 * 1000);
 389                         timediff_us = g_get_monotonic_time() - devc->fw_updated;
 390                         timediff_ms = timediff_us / 1000;
 391                         sr_spew("Waited %" PRIi64 " ms.", timediff_ms);
 392                 }
 393                 sr_info("Device came back after %" PRIi64 " ms.", timediff_ms);
 394         } else {
 395                 err = dso_open(sdi);
 396         }
 397
 398         if (err != SR_OK) {
 399                 sr_err("Unable to open device.");
 400                 return SR_ERR;
 401         }
 402
 403         err = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 404         if (err != 0) {
 405                 sr_err("Unable to claim interface: %s.",
 406                         libusb_error_name(err));
 407                 return SR_ERR;
 408         }
 409
 410         return SR_OK;
 411 }
 412
 413 static int dev_close(struct sr_dev_inst *sdi)
 414 {
 415         dso_close(sdi);
 416
 417         return SR_OK;
 418 }
 419
 420 static int config_get(uint32_t key, GVariant **data,
 421         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 422 {
 423         struct dev_context *devc;
 424         struct sr_usb_dev_inst *usb;
 425         const char *s;
 426         const uint64_t *vdiv;
 427         int ch_idx;
 428
 429         switch (key) {
 430         case SR_CONF_NUM_HDIV:
 431                 *data = g_variant_new_int32(NUM_TIMEBASE);
 432                 break;
 433         case SR_CONF_NUM_VDIV:
 434                 *data = g_variant_new_int32(NUM_VDIV);
 435                 break;
 436         }
 437
 438         if (!sdi)
 439                 return SR_ERR_ARG;
 440
 441         devc = sdi->priv;
 442         if (!cg) {
 443                 switch (key) {
 444                 case SR_CONF_TRIGGER_LEVEL:
 445                         *data = g_variant_new_double(devc->voffset_trigger);
 446                         break;
 447                 case SR_CONF_CONN:
 448                         if (!sdi->conn)
 449                                 return SR_ERR_ARG;
 450                         usb = sdi->conn;
 451                         if (usb->address == 255)
 452                                 /* Device still needs to re-enumerate after firmware
 453                                  * upload, so we don't know its (future) address. */
 454                                 return SR_ERR;
 455                         *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 456                         break;
 457                 case SR_CONF_TIMEBASE:
 458                         *data = g_variant_new("(tt)", timebases[devc->timebase][0],
 459                                         timebases[devc->timebase][1]);
 460                         break;
 461                 case SR_CONF_SAMPLERATE:
 462                         *data = g_variant_new_uint64(devc->samplerate);
 463                         break;
 464                 case SR_CONF_BUFFERSIZE:
 465                         *data = g_variant_new_uint64(devc->framesize);
 466                         break;
 467                 case SR_CONF_TRIGGER_SOURCE:
 468                         *data = g_variant_new_string(devc->triggersource);
 469                         break;
 470                 case SR_CONF_TRIGGER_SLOPE:
 471                         s = (devc->triggerslope == SLOPE_POSITIVE) ? "r" : "f";
 472                         *data = g_variant_new_string(s);
 473                         break;
 474                 case SR_CONF_CAPTURE_RATIO:
 475                         *data = g_variant_new_uint64(devc->capture_ratio);
 476                         break;
 477                 case SR_CONF_LIMIT_FRAMES:
 478                         *data = g_variant_new_uint64(devc->limit_frames);
 479                         break;
 480                 default:
 481                         return SR_ERR_NA;
 482                 }
 483         } else {
 484                 if (sdi->channel_groups->data == cg)
 485                         ch_idx = 0;
 486                 else if (sdi->channel_groups->next->data == cg)
 487                         ch_idx = 1;
 488                 else
 489                         return SR_ERR_ARG;
 490                 switch (key) {
 491                 case SR_CONF_FILTER:
 492                         *data = g_variant_new_boolean(devc->filter[ch_idx]);
 493                         break;
 494                 case SR_CONF_VDIV:
 495                         vdiv = vdivs[devc->voltage[ch_idx]];
 496                         *data = g_variant_new("(tt)", vdiv[0], vdiv[1]);
 497                         break;
 498                 case SR_CONF_COUPLING:
 499                         *data = g_variant_new_string(coupling[devc->coupling[ch_idx]]);
 500                         break;
 501                 }
 502         }
 503
 504         return SR_OK;
 505 }
 506
 507 static int config_set(uint32_t key, GVariant *data,
 508         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 509 {
 510         struct dev_context *devc;
 511         int ch_idx, idx;
 512         float flt;
 513
 514         devc = sdi->priv;
 515         if (!cg) {
 516                 switch (key) {
 517                 case SR_CONF_LIMIT_FRAMES:
 518                         devc->limit_frames = g_variant_get_uint64(data);
 519                         break;
 520                 case SR_CONF_TRIGGER_LEVEL:
 521                         flt = g_variant_get_double(data);
 522                         if (flt < 0.0 || flt > 1.0) {
 523                                 sr_err("Trigger level must be in [0.0,1.0].");
 524                                 return SR_ERR_ARG;
 525                         }
 526                         devc->voffset_trigger = flt;
 527                         if (dso_set_voffsets(sdi) != SR_OK)
 528                                 return SR_ERR;
 529                         break;
 530                 case SR_CONF_TRIGGER_SLOPE:
 531                         if ((idx = std_str_idx(data, ARRAY_AND_SIZE(trigger_slopes))) < 0)
 532                                 return SR_ERR_ARG;
 533                         devc->triggerslope = idx;
 534                         break;
 535                 case SR_CONF_CAPTURE_RATIO:
 536                         devc->capture_ratio = g_variant_get_uint64(data);
 537                         break;
 538                 case SR_CONF_BUFFERSIZE:
 539                         if ((idx = std_u64_idx(data, devc->profile->buffersizes, NUM_BUFFER_SIZES)) < 0)
 540                                 return SR_ERR_ARG;
 541                         devc->framesize = devc->profile->buffersizes[idx];
 542                         break;
 543                 case SR_CONF_TIMEBASE:
 544                         if ((idx = std_u64_tuple_idx(data, ARRAY_AND_SIZE(timebases))) < 0)
 545                                 return SR_ERR_ARG;
 546                         devc->timebase = idx;
 547                         break;
 548                 case SR_CONF_SAMPLERATE:
 549                         if ((idx = std_u64_idx(data, ARRAY_AND_SIZE(samplerates))) < 0)
 550                                 return SR_ERR_ARG;
 551                         devc->samplerate = samplerates[idx];
 552                         if (dso_set_trigger_samplerate(sdi) != SR_OK)
 553                                 return SR_ERR;
 554                         break;
 555                 case SR_CONF_TRIGGER_SOURCE:
 556                         if ((idx = std_str_idx(data, ARRAY_AND_SIZE(trigger_sources))) < 0)
 557                                 return SR_ERR_ARG;
 558                         devc->triggersource = g_strdup(trigger_sources[idx]);
 559                         break;
 560                 default:
 561                         return SR_ERR_NA;
 562                 }
 563         } else {
 564                 if (sdi->channel_groups->data == cg)
 565                         ch_idx = 0;
 566                 else if (sdi->channel_groups->next->data == cg)
 567                         ch_idx = 1;
 568                 else
 569                         return SR_ERR_ARG;
 570                 switch (key) {
 571                 case SR_CONF_FILTER:
 572                         devc->filter[ch_idx] = g_variant_get_boolean(data);
 573                         break;
 574                 case SR_CONF_VDIV:
 575                         if ((idx = std_u64_tuple_idx(data, ARRAY_AND_SIZE(vdivs))) < 0)
 576                                 return SR_ERR_ARG;
 577                         devc->voltage[ch_idx] = idx;
 578                         break;
 579                 case SR_CONF_COUPLING:
 580                         if ((idx = std_str_idx(data, ARRAY_AND_SIZE(coupling))) < 0)
 581                                 return SR_ERR_ARG;
 582                         devc->coupling[ch_idx] = idx;
 583                         break;
 584                 default:
 585                         return SR_ERR_NA;
 586                 }
 587         }
 588
 589         return SR_OK;
 590 }
 591
 592 static int config_list(uint32_t key, GVariant **data,
 593         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 594 {
 595         struct dev_context *devc;
 596
 597         if (!cg) {
 598                 switch (key) {
 599                 case SR_CONF_SCAN_OPTIONS:
 600                 case SR_CONF_DEVICE_OPTIONS:
 601                         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 602                 case SR_CONF_BUFFERSIZE:
 603                         if (!sdi)
 604                                 return SR_ERR_ARG;
 605                         devc = sdi->priv;
 606                         *data = std_gvar_array_u64(devc->profile->buffersizes, NUM_BUFFER_SIZES);
 607                         break;
 608                 case SR_CONF_SAMPLERATE:
 609                         *data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates));
 610                         break;
 611                 case SR_CONF_TIMEBASE:
 612                         *data = std_gvar_tuple_array(ARRAY_AND_SIZE(timebases));
 613                         break;
 614                 case SR_CONF_TRIGGER_SOURCE:
 615                         *data = g_variant_new_strv(ARRAY_AND_SIZE(trigger_sources));
 616                         break;
 617                 case SR_CONF_TRIGGER_SLOPE:
 618                         *data = g_variant_new_strv(ARRAY_AND_SIZE(trigger_slopes));
 619                         break;
 620                 default:
 621                         return SR_ERR_NA;
 622                 }
 623         } else {
 624                 switch (key) {
 625                 case SR_CONF_DEVICE_OPTIONS:
 626                         *data = std_gvar_array_u32(ARRAY_AND_SIZE(devopts_cg));
 627                         break;
 628                 case SR_CONF_COUPLING:
 629                         *data = g_variant_new_strv(ARRAY_AND_SIZE(coupling));
 630                         break;
 631                 case SR_CONF_VDIV:
 632                         *data = std_gvar_tuple_array(ARRAY_AND_SIZE(vdivs));
 633                         break;
 634                 default:
 635                         return SR_ERR_NA;
 636                 }
 637         }
 638
 639         return SR_OK;
 640 }
 641
 642 static void send_chunk(struct sr_dev_inst *sdi, unsigned char *buf,
 643                 int num_samples)
 644 {
 645         struct sr_datafeed_packet packet;
 646         struct sr_datafeed_analog analog;
 647         struct sr_analog_encoding encoding;
 648         struct sr_analog_meaning meaning;
 649         struct sr_analog_spec spec;
 650         struct dev_context *devc = sdi->priv;
 651         GSList *channels = devc->enabled_channels;
 652
 653         packet.type = SR_DF_ANALOG;
 654         packet.payload = &analog;
 655         /* TODO: support for 5xxx series 9-bit samples */
 656         sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
 657         analog.num_samples = num_samples;
 658         analog.meaning->mq = SR_MQ_VOLTAGE;
 659         analog.meaning->unit = SR_UNIT_VOLT;
 660         analog.meaning->mqflags = 0;
 661         /* TODO: Check malloc return value. */
 662         analog.data = g_try_malloc(num_samples * sizeof(float));
 663
 664         for (int ch = 0; ch < NUM_CHANNELS; ch++) {
 665                 if (!devc->ch_enabled[ch])
 666                         continue;
 667
 668                 float range = ((float)vdivs[devc->voltage[ch]][0] / vdivs[devc->voltage[ch]][1]) * 8;
 669                 float vdivlog = log10f(range / 255);
 670                 int digits = -(int)vdivlog + (vdivlog < 0.0);
 671                 analog.encoding->digits = digits;
 672                 analog.spec->spec_digits = digits;
 673                 analog.meaning->channels = g_slist_append(NULL, channels->data);
 674
 675                 for (int i = 0; i < num_samples; i++) {
 676                         /*
 677                          * The device always sends data for both channels. If a channel
 678                          * is disabled, it contains a copy of the enabled channel's
 679                          * data. However, we only send the requested channels to
 680                          * the bus.
 681                          *
 682                          * Voltage values are encoded as a value 0-255 (0-512 on the
 683                          * DSO-5200*), where the value is a point in the range
 684                          * represented by the vdiv setting. There are 8 vertical divs,
 685                          * so e.g. 500mV/div represents 4V peak-to-peak where 0 = -2V
 686                          * and 255 = +2V.
 687                          */
 688                         /* TODO: Support for DSO-5xxx series 9-bit samples. */
 689                         ((float *)analog.data)[i] = range / 255 * *(buf + i * 2 + 1 - ch) - range / 2;
 690                 }
 691                 sr_session_send(sdi, &packet);
 692                 g_slist_free(analog.meaning->channels);
 693
 694                 channels = channels->next;
 695         }
 696         g_free(analog.data);
 697 }
 698
 699 /*
 700  * Called by libusb (as triggered by handle_event()) when a transfer comes in.
 701  * Only channel data comes in asynchronously, and all transfers for this are
 702  * queued up beforehand, so this just needs to chuck the incoming data onto
 703  * the libsigrok session bus.
 704  */
 705 static void LIBUSB_CALL receive_transfer(struct libusb_transfer *transfer)
 706 {
 707         struct sr_dev_inst *sdi;
 708         struct dev_context *devc;
 709         int num_samples, pre;
 710
 711         sdi = transfer->user_data;
 712         devc = sdi->priv;
 713         sr_spew("receive_transfer(): status %s received %d bytes.",
 714                 libusb_error_name(transfer->status), transfer->actual_length);
 715
 716         if (transfer->actual_length == 0)
 717                 /* Nothing to send to the bus. */
 718                 return;
 719
 720         num_samples = transfer->actual_length / 2;
 721
 722         sr_spew("Got %d-%d/%d samples in frame.", devc->samp_received + 1,
 723                 devc->samp_received + num_samples, devc->framesize);
 724
 725         /*
 726          * The device always sends a full frame, but the beginning of the frame
 727          * doesn't represent the trigger point. The offset at which the trigger
 728          * happened came in with the capture state, so we need to start sending
 729          * from there up the session bus. The samples in the frame buffer
 730          * before that trigger point came after the end of the device's frame
 731          * buffer was reached, and it wrapped around to overwrite up until the
 732          * trigger point.
 733          */
 734         if (devc->samp_received < devc->trigger_offset) {
 735                 /* Trigger point not yet reached. */
 736                 if (devc->samp_received + num_samples < devc->trigger_offset) {
 737                         /* The entire chunk is before the trigger point. */
 738                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 739                                         transfer->buffer, num_samples * 2);
 740                         devc->samp_buffered += num_samples;
 741                 } else {
 742                         /*
 743                          * This chunk hits or overruns the trigger point.
 744                          * Store the part before the trigger fired, and
 745                          * send the rest up to the session bus.
 746                          */
 747                         pre = devc->trigger_offset - devc->samp_received;
 748                         memcpy(devc->framebuf + devc->samp_buffered * 2,
 749                                         transfer->buffer, pre * 2);
 750                         devc->samp_buffered += pre;
 751
 752                         /* The rest of this chunk starts with the trigger point. */
 753                         sr_dbg("Reached trigger point, %d samples buffered.",
 754                                 devc->samp_buffered);
 755
 756                         /* Avoid the corner case where the chunk ended at
 757                          * exactly the trigger point. */
 758                         if (num_samples > pre)
 759                                 send_chunk(sdi, transfer->buffer + pre * 2,
 760                                                 num_samples - pre);
 761                 }
 762         } else {
 763                 /* Already past the trigger point, just send it all out. */
 764                 send_chunk(sdi, transfer->buffer, num_samples);
 765         }
 766
 767         devc->samp_received += num_samples;
 768
 769         /* Everything in this transfer was either copied to the buffer or
 770          * sent to the session bus. */
 771         g_free(transfer->buffer);
 772         libusb_free_transfer(transfer);
 773
 774         if (devc->samp_received >= devc->framesize) {
 775                 /* That was the last chunk in this frame. Send the buffered
 776                  * pre-trigger samples out now, in one big chunk. */
 777                 sr_dbg("End of frame, sending %d pre-trigger buffered samples.",
 778                         devc->samp_buffered);
 779                 send_chunk(sdi, devc->framebuf, devc->samp_buffered);
 780                 g_free(devc->framebuf);
 781                 devc->framebuf = NULL;
 782
 783                 /* Mark the end of this frame. */
 784                 std_session_send_df_frame_end(sdi);
 785
 786                 if (devc->limit_frames && ++devc->num_frames >= devc->limit_frames) {
 787                         /* Terminate session */
 788                         devc->dev_state = STOPPING;
 789                 } else {
 790                         devc->dev_state = NEW_CAPTURE;
 791                 }
 792         }
 793 }
 794
 795 static int handle_event(int fd, int revents, void *cb_data)
 796 {
 797         const struct sr_dev_inst *sdi;
 798         struct timeval tv;
 799         struct sr_dev_driver *di;
 800         struct dev_context *devc;
 801         struct drv_context *drvc;
 802         int num_channels;
 803         uint32_t trigger_offset;
 804         uint8_t capturestate;
 805
 806         (void)fd;
 807         (void)revents;
 808
 809         sdi = cb_data;
 810         di = sdi->driver;
 811         drvc = di->context;
 812         devc = sdi->priv;
 813         if (devc->dev_state == STOPPING) {
 814                 /* We've been told to wind up the acquisition. */
 815                 sr_dbg("Stopping acquisition.");
 816                 /*
 817                  * TODO: Doesn't really cancel pending transfers so they might
 818                  * come in after SR_DF_END is sent.
 819                  */
 820                 usb_source_remove(sdi->session, drvc->sr_ctx);
 821
 822                 std_session_send_df_end(sdi);
 823
 824                 devc->dev_state = IDLE;
 825
 826                 return TRUE;
 827         }
 828
 829         /* Always handle pending libusb events. */
 830         tv.tv_sec = tv.tv_usec = 0;
 831         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 832
 833         /* TODO: ugh */
 834         if (devc->dev_state == NEW_CAPTURE) {
 835                 if (dso_capture_start(sdi) != SR_OK)
 836                         return TRUE;
 837                 if (dso_enable_trigger(sdi) != SR_OK)
 838                         return TRUE;
 839 //              if (dso_force_trigger(sdi) != SR_OK)
 840 //                      return TRUE;
 841                 sr_dbg("Successfully requested next chunk.");
 842                 devc->dev_state = CAPTURE;
 843                 return TRUE;
 844         }
 845         if (devc->dev_state != CAPTURE)
 846                 return TRUE;
 847
 848         if ((dso_get_capturestate(sdi, &capturestate, &trigger_offset)) != SR_OK)
 849                 return TRUE;
 850
 851         sr_dbg("Capturestate %d.", capturestate);
 852         sr_dbg("Trigger offset 0x%.6x.", trigger_offset);
 853         switch (capturestate) {
 854         case CAPTURE_EMPTY:
 855                 if (++devc->capture_empty_count >= MAX_CAPTURE_EMPTY) {
 856                         devc->capture_empty_count = 0;
 857                         if (dso_capture_start(sdi) != SR_OK)
 858                                 break;
 859                         if (dso_enable_trigger(sdi) != SR_OK)
 860                                 break;
 861                         if (!strcmp("forced", devc->triggersource)) {
 862                                 if (dso_force_trigger(sdi) != SR_OK)
 863                                         break;
 864                         }
 865                         sr_dbg("Successfully requested next chunk.");
 866                 }
 867                 break;
 868         case CAPTURE_FILLING:
 869                 /* No data yet. */
 870                 break;
 871         case CAPTURE_READY_8BIT:
 872         case CAPTURE_READY_2250:
 873                 /* Remember where in the captured frame the trigger is. */
 874                 devc->trigger_offset = trigger_offset;
 875
 876                 num_channels = (devc->ch_enabled[0] && devc->ch_enabled[1]) ? 2 : 1;
 877                 devc->framebuf = g_malloc(devc->framesize * num_channels * 2);
 878                 devc->samp_buffered = devc->samp_received = 0;
 879
 880                 /* Tell the scope to send us the first frame. */
 881                 if (dso_get_channeldata(sdi, receive_transfer) != SR_OK)
 882                         break;
 883
 884                 /*
 885                  * Don't hit the state machine again until we're done fetching
 886                  * the data we just told the scope to send.
 887                  */
 888                 devc->dev_state = FETCH_DATA;
 889
 890                 /* Tell the frontend a new frame is on the way. */
 891                 std_session_send_df_frame_begin(sdi);
 892                 break;
 893         case CAPTURE_READY_9BIT:
 894                 /* TODO */
 895                 sr_err("Not yet supported.");
 896                 break;
 897         case CAPTURE_TIMEOUT:
 898                 /* Doesn't matter, we'll try again next time. */
 899                 break;
 900         default:
 901                 sr_dbg("Unknown capture state: %d.", capturestate);
 902                 break;
 903         }
 904
 905         return TRUE;
 906 }
 907
 908 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 909 {
 910         struct dev_context *devc;
 911         struct sr_dev_driver *di = sdi->driver;
 912         struct drv_context *drvc = di->context;
 913
 914         devc = sdi->priv;
 915
 916         if (configure_channels(sdi) != SR_OK) {
 917                 sr_err("Failed to configure channels.");
 918                 return SR_ERR;
 919         }
 920
 921         if (dso_init(sdi) != SR_OK)
 922                 return SR_ERR;
 923
 924         if (dso_capture_start(sdi) != SR_OK)
 925                 return SR_ERR;
 926
 927         devc->dev_state = CAPTURE;
 928         usb_source_add(sdi->session, drvc->sr_ctx, TICK, handle_event, (void *)sdi);
 929
 930         std_session_send_df_header(sdi);
 931
 932         return SR_OK;
 933 }
 934
 935 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 936 {
 937         struct dev_context *devc;
 938
 939         devc = sdi->priv;
 940         devc->dev_state = STOPPING;
 941         devc->num_frames = 0;
 942
 943         return SR_OK;
 944 }
 945
 946 static struct sr_dev_driver hantek_dso_driver_info = {
 947         .name = "hantek-dso",
 948         .longname = "Hantek DSO",
 949         .api_version = 1,
 950         .init = std_init,
 951         .cleanup = std_cleanup,
 952         .scan = scan,
 953         .dev_list = std_dev_list,
 954         .dev_clear = dev_clear,
 955         .config_get = config_get,
 956         .config_set = config_set,
 957         .config_list = config_list,
 958         .dev_open = dev_open,
 959         .dev_close = dev_close,
 960         .dev_acquisition_start = dev_acquisition_start,
 961         .dev_acquisition_stop = dev_acquisition_stop,
 962         .context = NULL,
 963 };
 964 SR_REGISTER_DEV_DRIVER(hantek_dso_driver_info);